Bostik Fireseal Intumescent Silicone 310ml

Quick Overview

A high quality fire resistant silicone joint sealant that combines a mid-modulus silicone with the unique property of resistance to a fire. This silicone works to resist a fire for up to four hours depending on the application.

Bostik Fireseal Silicone is a superior fire resistant silicone joint sealant combining the performance characteristics of a mid-modulus silicone with the unique property of resistance to fire. Bostik Fireseal will resist the passage of fire for up to four hours depending upon application. The product has the added benefit in that in a fire situation it emits an extremely low level of toxic fumes and it does not smoke to an appreciable extent. Bostik Fireseal is therefore the ideal product for use in public areas, mass transit systems and fire escape routes. Bostik Fireseal has excellent adhesion to a wide range of substrates including masonry, will not slump from joints up to 25mm wide and is also suitable for external use. Bostik Fireseal Silicone can be used in both movement and non-movement joints i.e. for open butt joints in screens, partitions and structural walls. It has been shown to be effective as a service penetration seal for both metal pipes and cables, particularly where movement is a factor.

Key Features

Fire Resistant Silicone

Internal & external Use

Prevents The Passage Of Smoke & Flames

AdhesionExcellent to most clean, dry surfaces

ApplicationBostik Fireseal Silicone exhibits good adhesion to most building substrates, including brickwork, stone and other porous materials. If a protective lacquer or coating has been used to protect surfaces such as metals, the manufacturer's instructions regarding cleaning and removal should be followed and a trial carried out to ensure the adhesion of the sealant. Bostik Fireseal has good adhesion to painted timber provided the paint film is clean and sound and is firmly bonded to the timber. All surfaces must be sound, clean, dry and free from oil, grease, dust and other loose matter. Loose and friable materials should be removed from porous substrates mechanically. In joints subject to high movement where the substrate is porous, the joint surface should be primed with a silicone primer suitable for porous substrates. Cut off the dome at the top of the cartridge, cut the nozzle to the required diameter and then screw it onto the cartridge. Insert the cartridge into a skeleton gun and squeeze the trigger until the sealant appears. Force the sealant into the joint ensuring that it makes full contact with the sides. The sealant surface can be tooled to a smooth finish using a tooling stick or trowel dipped in diluted detergent within 3-5 minutes of application. Do not use a wetted finger. Clean application equipment and remove excess uncured sealant with white spirit and cured sealant by abrasion.